Multi-Frequency Tire Pressure Detector Using Phase Lock Loop
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Solution Overview
Problem
Current tire pressure detectors face challenges in flexibility and convenience, particularly when the transmission frequency of the host machine is unknown, leading to difficulties in installing compatible tire pressure detectors, as existing solutions require trial operations to set the frequency.
Innovation Solution
A multi-frequency processing device comprising an oscillator, microcontroller, phase lock module, and transmission module that generates and transmits signal frames with both 315 MHz and 433 MHz frequencies, allowing the system to automatically determine the receiving frequency, eliminating the need for pre-setting the transmission frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual-frequency detector is used to support multiple transmission frequencies, then the adaptability of the tire pressure detector is improved, but the device complexity increases due to additional circuit hardware for other transmission channels
Solution Approach 1:
The patent merges multiple transmission frequencies (315 MHz and 433 MHz) into a single detector unit by integrating a phase lock module that can generate multiple target frequencies from one oscillator, eliminating the need for separate detectors for each frequency
Solution Approach 2:
The detector is designed with universal frequency support by incorporating a phase lock module capable of generating multiple target frequencies (first target frequency and second target frequency) from a single oscillator, allowing one detector to serve multiple frequency requirements
2Ease of operation
If the transmission frequency is pre-set in the tire pressure detector, then the ease of operation is improved, but the adaptability deteriorates when the host machine frequency is unknown
Solution Approach 1:
The detector performs preliminary frequency detection by transmitting signal frames containing both first target frequency and second target frequency, allowing the host machine to identify the matching frequency before full operation begins
Solution Approach 2:
The system uses feedback mechanism where the host machine receives signal frames at different frequencies, identifies the matching frequency, and provides match information back to the detector to confirm the correct frequency setting
3Adaptability or versatility
If trial operation is performed to determine the host machine frequency, then the adaptability is improved, but the loss of time increases due to the trial and error process
Solution Approach 1:
The detector transmits signal frames containing both first target frequency and second target frequency in advance during installation, allowing the host machine to quickly identify the matching frequency without requiring multiple trial operations
Solution Approach 2:
The detector transmits excessive frequency information (both first and second target frequencies) in the signal frame to ensure that the host machine can identify the matching frequency without requiring additional trial operations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution simplifies the installation process by allowing the tire pressure detector to automatically adjust its frequency, reducing the need for trial operations and enhancing flexibility in frequency compatibility, thereby improving user convenience and reducing potential signal interference.
Implementation Method 1
an oscillator configured to provide an oscillation signal which is applied as a basis frequency
Implementation Method 2
a phase lock module electrically connected with the oscillator and the microcontroller, the phase lock module being configured to receive the oscillation signal, and generate a first target frequency and a second target frequency according to the first frequency information and the second frequency information
Data Source
AI summary
A multi-frequency processing device of a tire pressure detector and processing method thereof are provided. The device includes an oscillator providing an oscillation signal as a basis frequency; a microcontroller storing a first and a second frequency information; a phase lock module receiving the oscillation signal and generating a first and a second target frequency according to the first frequency information and the second frequency information; and a transmission module receiving a data from the microcontroller in a first mode, and generating a signal frame formed of the first and second target frequency carrying the data, so as to transmit the signal frame. Therefore, the transmission frequency does not have to be set in advance, improving the convenience of usage.